Antarctica is a very large area of the earth's surface, but—until recent years—was the least studied.
Antarctica is a very large area of the earth's surface, but—until recent years—was the least studied.
南极洲是地球表面上一块巨大的土地，但是，直到近年，人类的研究都很少涉及于此。
Antarctica is a very large area of the earth's surface, but—until recent years—was the least studied.
南极洲是地球表面上一块巨大的土地，但是，直到近年，人类的研究都很少涉及于此。